Recording Spans via HTTP Request Sink and Replaying Fails

[rauljordan]

Hi all,

I am trying to capture open trace spans from an application into an http request sink which marshals and writes base64 encoded raw requests into a file with Golang. I then open the file and replay the http requests to jaeger all-in-one at endpoint localhost:9412/api/v2/spans as mentioned in the docs.

When replaying the requests, each request fails with the following error:

&{POST / HTTP/1.1 1 1 map[Accept-Encoding:[gzip] Content-Length:[2096] Content-Type:[application/x-thrift] User-Agent:[Go-http-client/1.1]] 0xc000076600 <nil> 2096 [] false 127.0.0.1:9411 map[] map[] <nil> map[]  / <nil> <nil> <nil> <nil>}
http://localhost:9412/api/v2/spans
INFO[0003] HTTP/1.1 400 Bad Request
Content-Length: 25
Content-Type: text/plain; charset=utf-8
Date: Sat, 07 Aug 2021 02:36:32 GMT
Vary: Origin
X-Content-Type-Options: nosniff

Unsupported Content-Type

The code needed to reproduce this issue is the request sink here and the replayer here

Thank you for the attention!